1999 Buick Regal Owner's Manual - Page 141

yellowblue NORM: This setting brings in outside air and sends it through the instrument panel outlets. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 40_F (4_C). (Even when the compressor is running, you can control the temperature.) BI-LEV: This setting brings in outside air and directs it two ways. Half of the air is directed through the instrument panel outlets. Most of the remaining air is directed through the floor ducts and a little to the defrost and side window vents. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 40_F (4_C). (Even when the compressor is running, you can control the temperature.) VENT: This setting brings in outside air and directs it through the instrument panel outlets. HTR: This setting sends most of the air through the ducts near the floor. The rest comes out of the defroster and side window vents. BLEND: This setting allows half of the air to go to the floor ducts and half to the defroster and side window vents. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 40_F (4_C). (Even when the compressor is running, you can control the temperature.) FRONT: This setting directs most of the air through the defroster and side window vents. Some of the air goes to the floor ducts and the side window vents. The air conditioning compressor will run automatically in this setting unless the outside temperature is below 40_F (4_C). (Even when the compressor is running, you can control the temperature.) Air Conditioning On very hot days, open the windows long enough to let hot, inside air escape. This reduces the time for the vehicle to cool down. For a quick cool-down on very hot days, use MAX with the temperature knob and lever all the way in the blue area. If this setting is used for long periods of time, the air in your vehicle may become too dry. For normal cooling on hot days, use NORM with the temperature knob and lever in the blue area. The system will bring in outside air and cool it. On cool, but sunny days, the sun may warm your upper body, but your lower body may not be warm enough. You can use BI-LEV and set the temperature knob to a comfortable setting. The system will bring in outside air and direct it to your upper body, while sending slightly warmed air to your lower body. You may notice this temperature difference more at some times than others. 3-3